First, I almost chose the professionel 3 with heating (T), because I wanted to have possible agile technology in the aquarium (optics, cleaning and comfort). Here the price and performance is but another in any healthy relationship. That's at least my opinion. If the heater malfunction, the outer container of filter should be replaced. Price for the Eheim spare parts list is roughly at 250, - Euro. Not bad. For the extra cost of the T-Model (incl. Heating) then I have rather taken a professionel 3e execution. I have fortunately found an alternative for the T-model. An outdoor heater with PTC system can be connected to the external filter (Hydor ETH - External Thermal Heater / Price 45, -).
Eheim external filter professionel 3e (e = External Filter with electronic control) has the advantage that you can work here for Ex., Inter alia, on the day and at night with other flow rates. With me on the day (light phase) 1/3 of the flow rate and in the night 2/3. The advantage, on the day CO2 is better resolved, held in the water and the UV-C lamp operates defektiver. The CO2 supply and the UV-C lamp off with the lighting. At night, neat filtered and introduced more oxygen. My CO2 is incidentally introduced also an outdoor reactor into the water. In the aquarium, so is only (technical) of the water pipe and drain.
My personal conclusion:
Eheim external filters are always a good choice and with the best on the market. A slightly higher price for this quality is then justified to me. Only those like me who want to regulate the flow (eg day / night od. Waves simulate), should take an E-Model (electronic control). The idea and the heating in the EHEIM external filter should be installed is good but the price and a possible replacement for a defective speak against this purchase. Here Eheim should, if appropriate, rectify something. The Eheim external filter professionel 3e offer without filter material and control cables (High initial Zugl 130, -. Accessories) I find dishonest concealment price. Again a good Eheim product (therefore perfect score), a good product development but, unfortunately, a bad (sales / price) management.
I would recommend this product in combination with the dealer offering (including control cables and filters..) At a price below 300, - buy repeatedly. But not at any price, to the unique selling points are still too small. My recommendation to buy definitely for the quality of Eheim external filter and this simple complete range of dealer.
